PRE-RELEASE
DTC P0722 or P0723
| DTC P0722 or P0723 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P0722
Output Speed Sensor Circuit No Signal
DTC P0723
Output Speed Sensor Circuit Intermittent
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| OSS Supply Voltage | P0722 | P0722 | - | - |
| OSS Signal | P0722, P0723 | P0722, P0723 | P0722, P0723 | - |
| Typical Scan Tool Data |
Transmission OSS
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
| Operating conditions: Engine running, normal operating temperature Parameter Normal Range: 0-7,000 RPM | |||
| OSS Supply Voltage | 0 RPM | 0 RPM | - |
| Transmission OSS Signal | 0 RPM | 0 RPM | 0 RPM |
ISS/OSS Supply Voltage
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
| Operating conditions: Key ON, Engine OFF or Engine running, normal operating temperature Parameter Normal Range: OK | |||
| Transmission OSS Signal | OK | OK | OK |
| OSS Supply Voltage | Out of Range | OK | Out of Range |
| Circuit/System Description |
The output speed sensor (OSS) is a hall-effect type sensor. The sensor faces the front differential transfer drive gear. The sensor receives 8.3-9.3 volt via the OSS supply circuit from the transmission control module (TCM). When the output shaft rotates, the sensor creates a signal frequency that is based on the output shaft's machined surface. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses the OSS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.
| Conditions for Running the DTC |
P0722
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DTC P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, P0722, or P0723 is not set.
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The selected range is not PARK or NEUTRAL.
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The transmission input speed is 1,000 RPM or greater.
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The engine speed is 3,200 RPM or greater.
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The throttle position is 5 percent or greater.
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The throttle position signal is valid.
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The engine torque is 35 Nm (26 lb ft) or higher.
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The engine torque signal is valid.
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The TFT is -40°C (-40°F) or greater.
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The engine speed is 400 RPM or greater for 5 seconds.
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The ignition voltage is 8.6 volts or greater.
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P0723
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DTC P0101, P0102, P0103, P0121, P0122, P0123, P0723, P0973, P0974, P0976, or P0977 is not set.
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Greater than 5 seconds since last range change.
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The engine speed is 400 RPM or greater for 5 seconds.
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The ignition voltage is 8.6 volts or greater.
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| Conditions for Setting the DTC |
P0722
The transmission output speed is 70 RPM or less for 4.0 seconds.P0723
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The transmission output speed is 105 RPM or greater for 0.2 second.
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The transmission output speed drops greater than 650 RPM and does not recover for 1.5 seconds.
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| Action Taken When the DTC Sets |
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DTCs P0722 and P0723 are Type A DTCs.
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The TCM freezes transmission adaptive functions.
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The TCM turns the high side driver OFF.
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The TCM commands maximum line pressure.
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The TCM inhibits Tap Up/Down function.
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The TCM inhibits manual shifting of forward gears.
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The TCM limits the transmission to Reverse and 5th gear operation.
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| Conditions for Clearing the DIC/DTC |
DTCs P0722 and P0723 are Type A DTCs.
| Diagnostic Aids |
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Damage or misalignment of the front differential transfer drive gear teeth surface or metallic debris on the face of the sensor may cause a speed sensor malfunction.
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Proper torque of the OSS mounting bolt is critical to proper OSS operation.
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| Reference Information |
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
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Component Connector End Views
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Inline Harness Connector End Views
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Description and Operation
Electronic Component Description for OSS
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
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Ignition ON, verify with a scan tool the transmission ISS/OSS Supply Voltage parameter displays OK.
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| 2. |
Operate the vehicle at 16-32 km/h (10-20 mph) while observing the scan tool Transmission OSS parameter. The Transmission OSS parameter should vary with the vehicle speed and not drop out.
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| 3. |
After you complete the steps described above, check the diagnostic trouble code is not reset by driving the vehicle according to the conditions for running diagnostic trouble codes (DTC). You can also drive the vehicle according to the conditions you see in Freeze Frame/ Failure records. If the vehicle passes the circuit/system verification procedure, then stop. Do not perform the circuit/system test or component test as this may result in unnecessary part replacement. Refer to
Testing for Intermittent Conditions and Poor Connections
.
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| Circuit/System Testing |
| 1. |
Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement . |
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Connect the vehicle wire harness X1 20-way transmission electrical connector to the Q8 control solenoid valve assembly.
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Disconnect the B14A OSS harness connector X4 from the Q8 control solenoid valve assembly.
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Ignition ON, test for 8.3-9.3 volts between the OSS voltage circuit terminal A X4 on the Q8 control solenoid valve assembly and ground at the transmission case.
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If not within the specified range, replace the Q8 control solenoid valve assembly. Refer to
Control Solenoid Valve and Transmission Control Module Assembly Replacement
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Perform the
Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
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Inspect the front differential transfer drive gear teeth surface for damage or misalignment and for metallic debris on the face of the sensor. Repair or replace as necessary.
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| 8. |
If all circuits test normal, replace the B14A output speed sensor.
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| Repair Instructions |
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Perform the Resetting of the transmission's adaption after all transmission repairs. |
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Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection . |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Output Speed Sensor Replacement
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Control Module References
for control solenoid valve assembly replacement, setup, and programming
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